MORSE CODE. How to learn and make radio contacts: New step-by-step manual, from the basics, easily. By EA7HYD: González EA7HYD, David Gonzalez: 9781698906508: Amazon.com: Books
GitHub - CyrusRoshan/morse-mp3: converts text to a mp3 file of the morse code. Used in HackDFW's Game 2016 puzzles